If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux athena-asamiya 2.6.15.1-ubuntu1athenacustom-DRI #22 PREEMPT Thu Mar 2 22:04:06 MYT 2006 i686 GNU/Linux
 
Gnu C                  4.0.3
Gnu make               3.81beta4
binutils               2.16.91
util-linux             2.12r
mount                  2.12r
module-init-tools      3.2.2
e2fsprogs              1.38
jfsutils               1.1.8
reiserfsprogs          3.6.19
reiser4progs           1.0.5
xfsprogs               2.7.7
pcmcia-cs              3.2.8
PPP                    2.4.4b1
Linux C Library        2.3.6
Dynamic linker (ldd)   2.3.6
Procps                 3.2.6
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               5.93
udev                   079
Modules Loaded         usbhid ipv6 savage drm video thermal processor fan button battery ac snd_seq_oss snd_seq_midi snd_seq_midi_event snd_seq snd_via82xx_modem snd_via82xx snd_ac97_codec snd_ac97_bus snd_mpu401_uart snd_pcm_oss snd_mixer_oss pcmcia firmware_class snd_rawmidi snd_seq_device snd_pcm snd_timer snd i2c_viapro uhci_hcd ehci_hcd rtc snd_page_alloc usbcore 8139too mii yenta_socket rsrc_nonstatic pcmcia_core i2c_prosavage i2c_algo_bit i2c_core psmouse soundcore via_agp agpgart evdev unix